Abstract
This study focused on improving the material properties of pea thermoplastic starch (TPS) with polycaprolactone (PCL) and flax fiber. Accordingly, composites of glycerol-plasticized pea starch, polycaprolactone, and flax fiber were prepared through solid-phase compounding and compression-molding. The specimens were characterized through scanning electron microscopy, tensile test, moisture absorption test, and differential scanning calorimetry. Morphological studies of the tensile fracture surfaces revealed poor TPS-PCL interfacial interaction and limited TPS-flax fiber interfacial bonding. The composites showed significant improvements in tensile strength with reduced moisture absorption capability essentially due to the hydrophobicity of PCL. Individual components of the composites retained their respective thermal properties, an indication of thermodynamic immiscibility.
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Acknowledgments
The authors are grateful to the Natural Sciences and Engineering Research Council (Canada) for providing the financial support for this study. The authors also appreciate Nutri-Pea Ltd. (Portage La Prairie, MB) for generously supplying the pea starch used. We equally acknowledge the assistance provided by Dr Yun Chen and Debbie Anderson of Agriculture and Agri-Food Canada, Thomas Bonli of Department of Geological Science, University of Saskatchewan, and the technical staff of the Department of Agricultural and Bioresource Engineering now Department of Chemical and Biological Engineering, University of Saskatchewan, Canada, towards the successful completion of this study.
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Fabunmi, O.O., Tabil, L.G., Panigrahi, S. et al. Effects of Incorporating Polycaprolactone and Flax Fiber into Glycerol-Plasticized Pea Starch. J Polym Environ 19, 841–848 (2011). https://doi.org/10.1007/s10924-011-0374-5
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DOI: https://doi.org/10.1007/s10924-011-0374-5